Correct ram-size parameter examples: remove 'M' suffix to show proper format

[erichung9060]

This PR corrects the documentation for the ram-size parameter in both the README.md and action.yml files by updating the example format.

Problem

The ram-size parameter documentation showed an inconsistent example format:

• Example: e.g. 2048M
• Description: "in KB or MB, denoted with K or M"

This suggested users should include the unit suffix in the parameter value, but the correct format expects just the numeric value.

Solution

Updated the examples in both files:

• README.md: Changed e.g. 2048M to e.g. 2048
• action.yml: Changed e.g. 2048M to e.g. 2048

The descriptive text about "denoted with K or M" remains unchanged to help users understand the unit notation, while the examples now show the correct parameter format that the action expects.